<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    div{
      width: 100px;
      height: 100px;
      background-color: red;
      /* 2.设置动画名称 */
      animation-name: move;
      /* 3.动画持续时间 */
      animation-duration: 2s;
      /* 4.动画速度曲线 */
      animation-timing-function:linear;
      /* 5.设置动画执行次数 n(n次) infinite(无限次) */
      animation-iteration-count:infinite ;
      /* 6.设置动画是否反向执行  alternate 反向执行*/
      animation-direction: alternate;
      /* 7.设置动画等待时间 */
      animation-delay: 2s;
    }
    section{
      width: 100px;
      height: 100px;
      /* 上外边距 */
      margin-top: 20px;
      background-color: red;
      /* 设置动画 */
      animation: rotate 2s linear infinite alternate;
    }
    img{
      animation: pound .2s linear infinite alternate;
    }
    /* 1.定义动画关键帧  */
    @keyframes move {
      /* from 动画开始 
        to 动画结束
        百分比 0% 25% 50% 100%
      */
      from{
        margin-left: 0px;
      }
      to{
        margin-left: 200px;
      }
    }
    @keyframes rotate {
      0%{
        /* 正方形  */
        background-color: red;
        /* 形变 平移 旋转 缩放 */
        transform: translateX(0px) rotate(0deg);
        /* 设置圆角边框 */
        border-radius: 0px;
      }
      100%{
        background-color: pink;
        transform: translateX(200px) rotate(360deg);
        border-radius: 50%;
      }
    }
    @keyframes pound {
      from{
        /* scale 缩小和放大 >1 放大 <1 缩小 */
        transform: scale(0.8);
      }
      to{
        transform: scale(1.2);
      }
    }
  </style>
</head>
<body>
  <div></div>
  <section></section>
  <img width="150px" src="https://img0.baidu.com/it/u=3587366479,4195056249&fm=253&app=138&size=w931&n=0&f=JPEG&fmt=auto?sec=1721322000&t=686e3abcef0a54b1692179e64e732275" alt="">
</body>
</html>